| A | B |
|---|
| Decimal | a number that uses place value and a decimal point to show values less than one, such as tenths and hundredths |
| Period | a three-digit grouping of whole numbers separated by commas where each grouping consists of units, tens, and hundreds |
| Place value | the value of a digit as determined by its location in a number, such as units, tens, hundreds, etc. |
| Compatible Numbers | numbers that are easy to compute mentally |
| Perimeter | the distance around the outer edge of a figure |
| Rounding | a type of estimation with specific rules |
| Area model | a rectangular grid formed from square units |
| Array | a set of items arranged in rows and columns |
| Factor | a number multiplied by another number to find a product |
| Multiplication | one of the four basic operations, where in the multiplication statement a x b = c, a is the multiplicand, b is the multiplier, and c is the product |
